Does anyone have any idea what size or brand this engine is? It came off of a small scooter, you can see the gearbox and chain drive. This is a strong little engine, I know it used to haul me down the road at 28mph. I can not find any markings on this engine at all except the carb there is a marking that is RUI*ING, the astric should be a star. There is a sticker on the gearbox that says 1E36F and under that it is 030128440. The gearbox is removable. Thank you for looking.